AirHint found the following cheapest return flights from Denver (DEN) to Dublin (DUB) in May 2026 (see full year).

Return flights

06 May - 13 May	Air Canada
13 May - 21 May	Aer Lingus	direct
03 May - 22 May	Air Canada
01 May - 08 May	Icelandair
06 May - 13 May	Aer Lingus	direct
03 May - 22 May	Aer Lingus	direct
02 May - 09 May	Icelandair
20 May - 25 May	British Airways
25 May - 01 Jun	British Airways
12 May - 19 May	Icelandair
01 May - 08 May	Aer Lingus	direct
27 May - 20 Jun	Aer Lingus	direct
25 May - 01 Jun	Aer Lingus	direct
23 May - 06 Jun	Aer Lingus	direct

Also check the deals for one-way flights from Denver to Dublin in May.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Denver to Dublin in May from $426

Return flights